The original poster didn't appear to be threatening a lawsuit because the game was poorly made.
If I interpret correctly, the original poster is stating that while LA is the company behind star wars, Obsidian is responsible for the design end of the game. And with Obsidian stating they will close the forums because of negativity, I absolutely agree with the poster.
When a developer creates something, the developer does have a certain amount of responsibility to the customer or EU (end user) for making certain that the software is fixed. If the issues are matching across sevral customers machines, the issue may be a setting on the customer/EU system. Or it could be a patch is needed.
Whichever it is, closing the forums because of customers who paid for a working product are upset that there aren't enough updates on a patch release shows a great deal of irresponsibility and carelessness on Obsidian's part, as well as a lack of respect for it's customers.
Good customer service means listening to the customer even when they are upset and trying to resolve the issue or at least soothe the customer into being patient. Telling the customer who bought a product you designed that you don't want to hear their complaints and don't really care about what they think of the product shows great irresponsibility.
Example: Let's say I own 'Y Company', and I make a product that will be popular. For this example, we'll call my product 'the amazing dynamic z product'. I release the product and soon after receive complaints that, let's say, it has started to remove the tips of customers fingers. Obvious design flaw. So I have my support and company numbers changed or disconnected due to the large volume of complaints pouring in. Of course a customer will sue me. I neglected to work with the customer to resolve the issue, which would be to replace the fingertips and the products.
I would encourage Obsidian to continue to keep the channels open with the customers and be in open communication with the customers.
An open and lasting relationship where developer listens to the customer even when the customer is complaining makes for a better relationship.
And should Obsidian close the forums, I for one will not purchase another Obsidian product. I support companies that stand behind their product and work to resolve issues with the customers, not against them.